Stop motion for looms



I March 21, 1933. J p CYOSTELLO 1,902,302

STOP MOTION FOR LOOMS Filed Jan. 23. 1951 6 Sheets-Sheet 1 FIG; I-

INVENTOR.

WITNESSES fispizflfiosieilog f E S ATTORN I INVENTOR:

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March 21, 1933.

J. P. COSTELLO 1,902,302

STOP MOTION FOR LOOMS Filed Jan. 25. 1951 GSheets-Sheet 2 WITNESSES TORNEYS.

March 21, 1933. R COSTELLQ 1,902,302

STOP MOTION FOR LOOMS Filed Jan. 23, 1931 6 Sheets-Sheet 3 .FIGtlIZ INVENTOR.

WITNESSES $35072 CosfeZiQ {J By M .E

ATTORNEY.

March 21, 1933. J. P. COSTELLO STOP MOTION FOR LOOMS Filed Jan. 23, 1931 e Sheets-Sheet 4 IN VEN T 0 R. BY Jasqphi? 00856210,

A TTORNE Y.

March 21', 1933. p COSTELLO I 1,902,302

STOP MOTION FOR LOOMS Filed Jan. 23. 1931 6 Sheets-Sheet 5 50 X INVENTOR. WITNESSES ATTORNEY.

V JasgpZz P. CosiezYo,

March 21, 1933. J. P. COSTELLO STOP MOTION FOR LOOMS FiI'ed Jan. 23, 1931 6 Sheets-Sheet 6 FIG: M.

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W ATTORNEY.

Patented Mar. 21, 1933 unites STATES PATENT mam JOSEPH P. COSTELLO, on JPHILAVDELPHIA, rENNsY vA IA, ASSIGNOR. T0 coLLINs &

AIKMAN conrormrroN, or PHILADELPHIA, PENNSYLVANIA, a CORPORATION on DELAWARE s'ror MOTION roe LOOMS Application fi1ed January 23, 1931. Serial No. 510,674.

This invention relates to stop motions for looms; and it has reference, more ,PZtItJC- 'ularly, to stop motions useful in connection with double shed looms for weaving double pile fabrics like velvets or carpets, to detect" broken or slack weft threads, and under such conditions to effect automatic stoppage of the looms. i V ,7 p y In weaving fabrics of the kind referred to, double sheds are formed with different sets of warp yarns, through which separate wefts are simultaneously shot, the wefts being subsequently beaten into position in the double fabric by forward movementof the lay of the loom toward the breast beams, after the man ner well known to skilled weavers. It'has been the practice heretofore, in multi-shed looms, to employ detectors atone sidof the loom to simultaneously Ffeel the two wefts on alternate picks of the shuttles. Accordingly, these detecting devices did not wholly accomplish the purpose for which they were designed, since they wereable to effect stoppage of the looms only after the shuttles had made a complete circuit, i. 'e. moved from one side of the loom to the other and back again. Diificulty has moreover been experienced with heretofore existent stop motions for multi-shed looms, in adiusting and ginning them to function properly andrelia In the main, my invention is directed toward overcoming the above recited drawbacks of previous practice; and this I accomplish, as hereinafter fully explained, through provision of a (center) weft stop motion embodying detectors for feeling the picks of the wefts at points intermediate tion with the attached drawings, whereof.

Fig. I is a fragmentary plan'vi'ew of a double shed loom embodying my improved stop motion',-with the lay of the loom shown in the retracted position. i FigII is'a fragmentary longitudinal'sectional view of theloomtaken as indicated by the'arrows IIII in Fig. I.

FigIII is a View, likeFig. II, showing" the lay of the loom advanced about halfway of its active-stroke and the corresponding positions ordinarily taken bythe various parts of the stop motion.

Figs. IV andand V are views corresponding to Figs. I and II showing the positions normally ass'umed by the parts of: the stop motion at the time when the lay is beatingup the wefts. V

Fig. VI'is a fragmentary sectional view of the loom corresponding to Fig. III and showing theaction of the stop motion in the absence or failure ofone of the weft threads, i to bring about automatic stoppage of the loom.

' Figs. VII and VIIIare detail viewsof I in association with a portion of my improve stop motion.

Fig. X isa fragmentary longitudinal sectional view, more or less diagrammatically represented, of the loom viewed as indicated by the arrows XX in Fig. IX.

Fig. XI is a planvview of theparts shown in Figs. IX and X.

'Figs. XII, XIII and XIV are views corresponding to Figs. I'X XI, showing the parts in different positions. Referring in greater detail, first more particularly to Figs. I'and IVo'f these illustrations, it will be observed that my improved stop motion comprises a bracket 10 which is bolted to'the inside of a supplemental breast beam 11, the latter overlying the main breast beam 12 with provision of an intervening interval 13 for passage of'the double fabricF incident to its formation. Subsequent to passage through the'interval 13, the'cross or pile threads joining the ground weaves of the double fabric F are severed centrally after common practice, and the separate fabrics f, f thus formed taken up by rollers conventionally indicated at R, R. Fulcrur'ned on the bracket is a lever whereof the upper end is connected, through a link 16, with a bracket plate 17 secured to the reed cap rail 18 of the lay which is comprehensively designated by the numeral 19, the reed 20 being retained in the usual manner be tween the said cap and the lay beam 21. As the lay 19 moves toward and away from the breast beam 12 incident to weaving of the double fabric F, the lever 15 is rocked and motion in turn communicated, through a link 22, to a slide carriage 23 which is confined to horizontal reciprocation by a bracket-like guide 25 also securedto the rear face of the supplemenal breast beam 11.

Fulcrumed for independent swinging movement on a pivot axis 26 on the slide carriage 23, are detector fingers 27 and 28 which are grouped in pairs and which respectively project rearward toward the lay 19 from counterweighting tail portions 29, 30. It will be observed that the ends of the detector finger-s27, 28 are curved upwardly as at 27a,

.. 28a for capacity to engage, from beneath, the,

weft threads T, T which are simultaneously shot crosswise of sheds formed between the warps IV, W and "W V by shuttles indicated conventionally at S, S in Fig. II.- Normally with the weft threads T, T lying unslacked within the sheds, the detector fingers 27, 28 are held by the said, threads, in oppo-v sition to their counterweights 29, 30,in the positions shown in Fig. III when the lay 19 is moving forward through its active stroke toward the breast beam 12. Lateral stud lugs 31, 32 of the-detector finger counterweights 29, 30, project respectively into the range of horizontal ledges 33, 34 afforded by the guide 25. At 35 and. 36, the ledges 33 and 34 are respectively formed with. cam rises, which, in cooperation with the lateral lugs 31, 32 of the detector finger counterweights 29, 30 operate to swing the detector fingers 27, 28 downward, see Fig. II, as the lay 19 moves rearward, in readiness to be overshot' by the weft threads T, T; When the weft threads T, T are present and engaged by the detector fingers 27, 28, the lugs 31, 32 of the counterweights 29, 30 are held above, i. e., out of contact with the ledges 33, 34 of the guide 25- during the greater part of the active stroke of the lay 19. However, in the absence or slack of the weft threads T, T, the counterweight-s 29, 30 will obviously swing downward until the lugs 31, 32 rest on the straight horizontal portions of the ledges 33, 34 with attendant lifting of the detector fingers 27, 28 above the sheds.

Fulcrumed at 37 to still another bracket arm 38 reaching rearward from the supplemental breastbeam 11, isa tappet 39 (Fig. VII) having a short upward extremity 396;, which, by means of alight tension spring 4 0,, is yieldingly held in. engagement with a.

*weft threads T, 1

stud 41 projecting laterally from a finger 42 independently swingable on the fulcrum center 37. A spring 43, stronger than the tension spring above referred to, serves to normally maintain the finger 42- in the vertical position shown in Figs. 11 and III with its stud 41 engaging a stop 44 formed on the bracket arm 38. At its bottom, the tappet 39 is fitted With a stud 45 which is adapted to be engaged by projections 46, 47 of the detector finger counterweights 29, 30 when the said counterweights are in lowered positions with the lateral studs 31, 32 resting on the ledges 33, 34 attendant upon failure of the The finger 42 is electrically grounded with the frame of the loom, and, when swung to the position shown in F ig; VI, is brought into engagement with a spring contact48, which is anchored in a block of insulation 480, Fig. 1 on the bracket arm138, by means of a terminal screw 49 in circuit with aconductor 50 carrying electric current. I Referring now to Figs. IXXIV the operating hand lever for the usual drive control mechanism (not shown) of the loom is indicated'at 51, the same being held in opposition to a spring (likewise not shown) in the on position in engagement with a lateral offset 52 in the horizontal slot of its guide 54.

Pivoted to the hand lever 51 at one side is a.

sword arm 55 which is adapted to be moved, in a manner lateron explained, from the full to the dotted line position shown in Fig- XIII into the path of a stud 56 adjust-able 1 on the. lay 19 of the loom. The means for moving the sword arm 55 includes a link 57 that forms an operating connection between said arm and the armature of a solenoid conventionally indicated at 58. This solenoid 58 isv in circuit with the spring contact 48 on the bracket arm 38. through the conductor 50. Also in circuit with the solenoid 58 isa switch 59 whereof the actuating arm 60 is in the path of a projection 61. on the operating hand lever 51, so that said switch is closed when the hand lever 51 is swungto the on position. I

The operation of my stop motion is as follows: Let it be assumed that the operating hand lever 51 of the drive control means of the loom is locked in the on position within the lateral offset 52 of the slot 53 in the guide 54, as in Figs. IX and XI, and that the loom is in operation with the lay 19 in theretracted position illustrated in Figs. I and II; the'shuttles- S, S are simultaneously shot through the two sheds formed between the warps W, VV and VV respectively and lay the weft threads T, T crosswise of theends of the detector fingers 27, 28, the latter being at this time held lowered, as shown in Figs. I. and II,'by the camrises 35, 360i the ledges 33, 34 which co-act with the v lateralglugs 31,32on their counterweights 29, 30. As the lay 19 moves forward toward thebreast beam 12, the lugs 31, 32 on the counterbalances 29, 30 of thedetector fingers 27, 28 drop away from the cam rises 35, 36,- so that said fingers are for a time held in the positions shown in Fig. III. solely by the weftthreads'I, T. This condition obtains until the projections 46, 47 on the counter, balances 29, 30 have passed over the stud 45 on the tappet 39, whereupon, as a consequence of acceleration in the movement of the carriage 23 due to the proportioning of the linkageconnectionswith the lay 19, the detector fingers 27, 28 are withdrawn from the weft threads T, T so that the latter may be beaten into position in the fabric F when said lay completes its movement in the forward direction, as in Figs. IV and V. Then', as the movement of the lay 19 is reversed, i. e. as the lay recedes from the breast beam 12, the lateral lugs 31, 32 on the counterbalances 29, 30 ride first along the ledges 33, 34 and finally mount the cam rises 35, 36, whereby the detector fingers 27, 28 are lowered in readiness to catch succeeding picks of the weft threads T, T in precisely the same manner as aforedescribe Y In the absence or failure of one or both of the weft threads T, Tsay for example the weft thread Twhich may result either from exhaustion of the yarn in the corresponding shuttle S or through rupture, the detector finger 28 will not be held depressed after the lug 32 on its counterweight 30' has left the cam rise 36 of the ledge 34 during the forward movement of the lay19. Consequently, the projection 47 on the counterweight 30 of the detector finger 28 will fall to the ledge 34 as in Fig. VI, and in the continued movement of the carriage 23 with thelay 19, the projection 47 on the counterweight 30 of the said finger will engage the stud 45 of the tappet 39, whereof the movement will be in turn. communicated to the finger 42 with resultantengagement of the latter with the spring contact 48, as shown in Figs. VI and VII. As a result, the circuit through the solenoid 58 will be closed, and, through the energization of said solenoid,

" the sword arm 55 on the hand lever 51 of the drive control mechanism will be elevated into the path of the stud 56 on the lay 19, as shown in dot and dash lines in Fig. XIII. Accordingly, as the lay 19 approaches the end of its forward motion, the hand lever 51 is disweaving at the one time as'many different cross-connected fabric layers. By virtue of disposal of the detector fingers 27, 28 and the parts immediately associated with them above the plane of the fabric F, they. are entirely out of the way and yet readily acces:

sible for the purposes of inspection and ad justment when necessary. I V V Having thus described my invention, I claim:

1. In a loom having a breast beam and lay, a weft stop motion includinga counterweighted detector finger supported between said beam. and lay for reciprocation by the latter, said finger being pivoted above the plane of the fabric Woven and adapted to engage the weft from beneath and so be held 7 adapted to engage the weft from beneath;

means for withdrawing the finger from the .weft just before beating up of the latter by the lay of the loom; and means subject to actuation by the detector finger upon release thereof in the absence or failure of the weft, up until the time of withdrawal as aforesaid, to automatically stop the loom. Y

p 3. A weftstop motion for looms including i a counterweighted detector finger pivoted above the plane of the fabric being woven,

the saidfinger projecting rearward toward the lay of the loom and beingadapted to engage the weft from beneath; means for withdrawing the detector finger from the weft just before beating up of the latter-,bythe lay; and means subject to actuation by the detector finger upon release thereof in the absence or failure of the weft, up until the time of withdrawal as aforesaid, to automatically stop the loom.

4. A weft stop motion for looms including a counterweighted detector finger adapted to engage the weft from beneath; a carriage i.

above the plane of the fabric being woven aifordingrthe detector finger pivotal support;

means for moving the carriage in synchronism with the lay of the loom, with provision for withdrawal of the finger from the weft just before beating up of the latter by the lay; and means subject to actuation by the detector finger upon release thereof in the absence or failure of the weft, up until the time of withdrawal as aforesaid, to automatically stop the loom. r

5. A weft'stop motion for looms including a counterweighted detector finger in advance of the layof the loom, and projecting rearward toward the same and adapted to engage the weft from beneath; a carriage in a plane above the fabric being woven afiording the detector finger pivotal support; means for moving the carriage in synchronism with the lay, with provision for withdrawal of the finger fromthe weft ust before beating up of the latter; and means subject to actuationby the detector finger upon release therof in the absence or failure of the weft,up until the time of withdrawal of the finger as aforesaid, to automatically stop the loom. 1 j I 6. In a multi-shed loom having a breast beam and a lay, a'stop motion'including coaXially-pivoted separate detectors operatively coordinated between said beam and-lay for reciprocation by the latter, for feeling the picks of the weft threads simultaneously shot through the several sheds incident to weaving of double fabric, the said detectors moving synchronously with the lay of the loom; and means subject to actuation by any oneof the detectors, in the absence or failureuof the corresponding weft, to automatically stop the loom.

- '7. A stop motion for 'multi-shed looms including separate counterweighted pivoted detector fingers for feeling the picks of the weft threads simultaneously shot through the several sheds incident to'weaving of double fabric, the said detectors moving back and forth with the lay of the loom; and means subject to actuation by any one of the detectors, in the absence or failure of the corresponding weft, to automatically stop the loom.

8. A stop motion for multi-shed looms including separate counter-weighted pivoted detector fingers' in advance of the lay of the loom for feeling from beneath the picks of the weft threads simultaneously shot through the several sheds incident to weaving of double fabric means for normally withdrawing the detector fingers from beneath the weft threads immediately before beating up of the latter by the lay; and means subject to actuation by any one of the detector fingers, when released in the absence orfailure of the corresponding weft, to automatically stop the loom. 9. A stop motion for multi-shed looms including separate counter-weighted detector fingers for feeling the picks of the weft threads simultaneously shot through the sev eral sheds; a carriage forithe detector fingers moving in synchronism with the lay of the loom and withdrawn from the wefts immediately before beating-up of the latter by he lay; and means subject to actuation by any one of the'detector fingers, upon premature.

release thereof in the absence or failure of the corresponding weft, to automatically stop the loom.

10. A stop motion for multi-shed looms in-;

detector fingers inadvance of the lay of the I loom for feeling, from beneath, the picks of the weft threads simultaneously shot through the several sheds incident to weaving of the double fabric; a carriage for the detector fingers moving back and forth with the lay of the loom; stationary cam means operative during retraction of the lay to swing the fingers inv oppositionto their counter-weights so that their ends are positioned to engage beneath the weft threads as aforesaid; and means subject to actuation by any one of the detector fingers, upon premature release thereof in the absence or failure of the corresponding weft, to automatically stop the loom. 7

-11. Ina multi-shed loom having a breast beam and a lay, a weft stop motion including separate counterweighted fingers reciprocated-by the lay, said fingers being coaxially pivoted abovethe plane of the double fabric being woven and adapted to'respectively engage, from beneath, the weft threads simultaneously shot through the several sheds incident to weaving of the fabric, and so be held down thereby withoutthemselves tending to shift the weft in the shed: and means subject to actuation by any one of the detector fingers, upon release in the absence or failure of the corresponding weft, to automatically stop the loom. v 1 v 12. In a multi-shed loom having a supplemental breast beam and a lay, a stop motion including separate coaXially pivoted detectors for feeling the picks of the weft threads simultaneously shot through the several sheds incident to weaving of double fabric, said detectors being reciprocated synchronously with and by the lay of the loom; electric circuit closing means subject to actuation by any one of the detectors upon release thereof in the absence or failure of the corresponding weft thread;-and means in circuit with the circuit closing means aforesaid to effect automatic stoppage of the loom.

13. In a multi-shed loom with drive mechanism controllable by a hand lever, a stop motion-includingseparate detectors for feeling the picks of the weft threads simultaneously shot through the several sheds incident to weaving of double fabric: electric circuit closing means subject to actuation by any one of the detectors, upon release thereof in the absence or failure of the'corresponding weft; magneticmeans in circuit with the circuit closing means aforesaid; and a member projected by the magnetic means into the path of the lay of the loom to operate the control handle of the drive mechanism and automatically stop the loom.

V 14. In a multi-shed loom with drivemechanism controllable by a hand lever, a stop motion including separate detectors for feeling picks of the weft threads simultaneously shot through'the several sheds incident to weaving in circuit with the circuit closing means aforesaid and the magnetic means, closed upon mal, weft-engaging position during part only of the movement of the lay, notwithstanding absence of the weft; and means subsequently actuated by said detector finger, upon the absence or failure of the weft, to automatically stop the loom. In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsyl- Vania, this 20th day of January, 1931.

JOSEPH P. COSTELLO.

movement of the hand lever to start the loom.

15. In a loom having a lay, a stop motion including a weft detector finger movable back and forth in synchronism with and by the lay; and means actuated by the detector finger, upon release thereof in the absence or failure of the weft, to automatically stop the loom.

16. A weft stop motion for looms including a pivoted counterweighted detector finger movable back and forth in synchronism with and by the lay of the loom and adapted to engage the weft from beneath; and means actuated by the detector finger, upon release thereof in the absence or failure of the weft, to automatically stop the loom.

17 A weft stop motion for looms including a weft detector finger movable back and forth in synchronism with and by the lay of the loom; a control circuit; with an electromagnetically-actuable means for'stopping the loom responsive to its condition of energization; and tappet means with an associated spring contact actuated by the detector finger, upon release thereof in the absence or failure of the weft, to alter the energy condition of said circuit and thereby stop the loom.

18. A weft stop motion for looms including a weft detector finger; means for reciprocating the finger in synchronism with the layv of the loom, but with accelerated movement to insure its withdrawal immediately before beating up of the weft; and means actuated by the detector finger, upon release thereof in the absence or failure of the weft up until the time of withdrawal as aforesaid, to automatically stop the loom.

19. A weft stop motion for looms including a weft detector finger moving back and forth in synchronism with the lay of the loom; means for maintaining said finger out of weft-engaging position until after the weft has been shot through the shed of the loom, and then releasing it to control by said weft; and means actuated by the detector finger, upon release thereof in the absence or failure ofthe weft, to automatically stop the oom.

20. A weft stop motion for looms including a weft detector finger moving back and forth in synchronism with the lay of the loom; cam means in the path of movement of said finger for maintaining the finger in nor- 

